Faster VO2 kinetics in arm exercise following circulatory occlusion of the legs

The kinetics of V̇O2 at the onset of sub-ventilatory threshold constant load work might be rate limited by circulatory transport of O2, or by metabolic utilization. To alter the available circulating blood volume relative to muscle mass, 7 subjects performed supine arm cycling exercise at 50W (males) or 40W (females) for 8 min with leg blood flow uncuffed (U) or cuffed (C). Occlusion was obtained in supine rest by rapidly inflating pressure …